//#include <iostream>
#include<string>
using namespace std;
class  ClassesNode
{
public:
	int No;
	studentList stu;
	ClassesNode* next;
};
class  ClassesList
{
public:
	bool add()
	{
		return true;
	}
	bool print()
	{
		return true;
	}
	ClassesNode head;
	ClassesNode end;
};
class studentNode
{
public:
	char level;
	string name;
	int No;
	studentNode* next;
};
class studentList
{
public:
	bool add()//(char level, string name, )
	{
		return true;
	}
		studentNode head;
	studentNode end;
};